Skin diseases encompass a wide range of conditions that affect the skin, the body's largest organ. Common skin diseases include acne, eczema, psoriasis, and dermatitis. These conditions can be caused by various factors such as genetics, allergies, infections, and environmental influences. Symptoms of skin diseases can vary but often include redness, itching, swelling, and changes in skin texture or color. Treatment options depend on the specific condition and may include topical creams, oral medications, lifestyle changes, and in some cases, light therapy. Preventing skin diseases involves maintaining good hygiene, using sunscreen, avoiding known allergens, and keeping the skin moisturized. Regular check-ups with a dermatologist can help in early detection and management of skin conditions. Understanding the causes and symptoms of skin diseases is crucial for effective treatment and maintaining overall skin health.